Specifications: Input voltage: 110V-120V Frequency: 60Hz Electric current: 2A Power: 680W Pressure: 20000Pa~24000 Pa Size: 19 x 16.5 x 19cm / 7.5"*6.5"*7.5" Weight: N/W 1.7/2.0 Kg The following is operating steps 1: pinch two sides of mouth of balloon with your fingers 2: cover inflation port with balloon 3: inflate balloon by pushing inflation port down 4: release inflation port when balloon size is suitable.PS: Not suitable for air cushion bed. Trademark AGPtek products are marketed exclusively by Brainydeal